Comparison : Item # US-175, 2000 Pound (lb) Capacity Eight Wheel Trolley
Item # US-171, 3000 Pound (lb) Capacity Eight Wheel Trolley
Item # US-276, 3000 Pound (lb) Capacity Eight Wheel Trolley with Side Rollers
Item # US-181, 4000 Pound (lb) Capacity Eight Wheel Trolley
Item # US-272, 4000 Pound (lb) Capacity Eight Wheel Trolley with Side Rollers